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Rosemount Models 3144 and 3244MV Smart Temperature Transmitters
6-6
LCD METER
(OPTION CODE M5)
The LCD meter for the Model 3144 and 3244MV transmitters provides
local indication of the transmitter output, and abbreviated diagnostic
messages governing transmitter operation. The meter features a
five-character liquid crystal display that provides a direct reading of the
digital signal from the microprocessor. During normal operation, and
depending on the configuration, the meter displays one of the following:
• Engineering Units
• Percent of Range
• Milliamps
• Alternating Between Engineering Units and mA
• Sensor 1 Engineering Units
• Sensor 2 Engineering Units (
Model 3244MV only
)
• Alternating Between Sensor 1 and Sensor 2 (
Model 3244MV only
)
• Differential Temperature (
Model 3244MV only
)
• Alternating Between Sensor 1, Sensor 2, and Differential
Temperature (
Model 3244MV only
)
If configured for engineering units and mA, the display alternates every
three seconds between the two readings. With a Model 275 HART
Communicator you can also change the engineering units displayed by
the meter. Select from mA, percent of span, ohms, mV, °C, °F, °R, and K.
The meter will display the output type that corresponds to each reading
on the
Output Type
line of the meter (see Figure 6-4 on page 6-9). The
words “Sensor 1” and “Sensor 2” will appear on the
Output Type
line
when average temperature is being displayed.
The meter can also simultaneously display the analog output signal
using a percent scale bar graph around the perimeter of the display face
as shown in Figure 6-2 on page 6-4. Turn the bar graph on and off with
the Model 275 HART Communicator. The meter lights all segments
immediately after power-up, during a transmitter self-test, or during a
master reset sent by a host supporting the Rosemount HART Protocol.